Tourniquet.



R. L MCFARLANE.

TOURNIQUET.

APPLICATION FILED AUG.5, 1918.

Patented Apr. 29,1915),

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UNTED STATES PAT -.R\OBERT-.E. MGFARLANE, OF DULUTH, MINNESOTA.

TOVURNIQUEE specietionofrleaers Patent. raient-ea apr. ae, raie.

`Application'.led August 6, 1918. Serial N0.L248,536.

`To all whom'z'may concern .Be it :known that I, fRoBERT .MOFAR- LANE, a lcitizen of `the VUnited States, {residing .at LDulutli, in theoounty ofSt. Louis and State of Minnesota, have invented certain new .and useful Improvementsfin'Tourniquetaof which the ollowingis .aspecification, reference being had ,1 therein .fto .the accompanying drawing.

`My invention relates :to surgical instruments and moreffparticularlyto zin-improved formof tourniquet.

lAn object of .my `.invention is 'to provide an Yinstrument of the :above A.t pe .which may be easily and very quicklyxadjustedto a'limb tobe treated. Y v

Alfurther object oftheinvention istoprovide an arrangement :whereby additional pressure may'be accurately appliedtoa particular spot on `the limb -such as over an artery. p

Various other obj eots of myiinvention-wil-l be apparent lfrom perusal of the following specilication and fthe accompanying ndraw*- in s.

lily invention Ais `illustrated in fthe accom-4 panying drawings inwhiehma Figure lis agsectionalxview of lmydevice complete. y

Fig. -2 is a transverse section through the handle taken on the line 2-2 of Fig. 1 with the-bandlock inits raised position. v

Fig. 3 is a top plan View of the ha-ndleby itself.

Referring to the drawings in detail, the handle 1, formed of suitable light and strong material such as aluminum, is provided with a chamber 2 having end openings 3 and 4 and a top opening 5. A strap or band 6 of suitable flexible material such as leather has one end 7 secured to the handle within the recess by means of a head formed on its end and held within the chamber 2 between the lower -wall thereof and a transverse bar 8. `The head at the end 7 may be formed by bending the end of the strap over and stitching or riveting through as indicated. The end of the band may be fixed within the handle in any well known manner. The method shown, however, is preferred, as it enables the band to be removed and replaced by simply raising band lock 10 perpendicular and threading the band into chamber 2 through top openin 5 and pulling the free end out through t e opening 3 until the headed end 7 wedges in between the lower wall of the chamber and' the transverse bar ,18; From the fixed end 7'the band 6 extends out and back through .the opening?) for ing Va loop as shown, the freeend 9 of the band'passinfr through the bandlock 10 within the cham er 2 and out through the openingll. .The band lock l() ispreferably in the form of a cinch `lock pivoted within the chamberV by means of pivot lugs 12 journaled in sockets 18 .formed in opposite side walls ofthe chamber, and provided `with a slot or opening lllvthrough which the band passes. The lock 10.is arranged in the chamber 2 belowc'the opening 5 to permit an operator to manipulate .it through the opening 5 with thefthurn'b or finger. The handle 1 at the forward portion or loop end is provided with .a downwardly projecting portion 15 arranged to engage with and exert a downward pressureon:the'band at 16 when the handle is swung downwardly toward the loop -in the position shown in Fig. 1, the point where the ends of the loop enter the openingac'ting as a. fulcrum. YThe surface 15 ispreferably formed with a broad curvature `as shown toavoid an undue concentration :of the pressure. `To hold the lever in different positions of adjustment I provide a handle lockpreferably in the form as shown which consistso'f a spring hook or snap 17 carried at the free end of the handle 1 and adapted toengage any one of a series of lrings 18 fastened to the band 6.

In operation the loop of the band 6 is placed over the limb to vbe treated and the free end 9 of the band pulled through the handle in the direction indicated by the arrow in Fig. 1, while holding the handle up or more or less in a radius of the loop, until the required compression is obtained, where-v upon the thumb or linger is inserted through the opening 5 and the lock 10- pressed downwardly so as to take a cinch hold on the band and prevent its slipping back through the opening `3. The lever 1 is then swung downwardly toward the position shown in Fig. 1 to exert an additional pressure at the point 16, 'the loop being originally positioned to bring this point over a particular portion of the limb where additional pressure is desirable, the handle being then locked in position by engaging the hook 17 with whichever one of the rings 18 is required to hold the handle in adjusted position. From the above description it will be seen that my derice may very easily and quickly be applied.

to the limb to be treated and the additional pressure accurately adjusted and applied to the selected portion of the limb, and readily locked in adjustment or released as required. While I have here shown and described a specific embodiment of my invention for purposes of disclosure, it is to be understood that the invention is not limited to such spe cie embodiment but that all such modifications and variants thereof as fairly fall within the scope ofthe appended claims are contemplated by me.

Having thus described my invention what I claim and desire to secure by Letters Patent is# v l. A tourniquet comprising a eXible ban formed in a loop, means arranged to bear against the outer surface of the loop and exert an inward pressure thereon at a given point, and means for locking said pressure applying means in different adjustments.

2. A tourniquet comprising a band or loop arranged to smb-race a limb to be c0mpressed, means for tightening the loop, and a lever fulcrumed at the ends of the loop and provided with a compression portion intermediate the loop ends and the ree end of the lever. Y

3. A tourniquet comprising a band or loop arranged to embrace a limbto be compressed, means for tightening the loop, and a leverfulcrumed on the loop and provided with a compression portion intermediate the fulcrum and thefree end of the lever, to'- gether with `means for holding the free end of said lever in diiferent positions in relation to the loop to maintain different degrees of pressure on the limb beneath the said compression portion ofV the lever.

el. A tourniquet comprising a lever handle, an adjustable band or loop of flexible material carried" at one end of said handle, and means for holding the free end of the handle at a given distance from the loop to cause a portion of the handle intermediatey the ends to press inwardly against the loop.

5. A tourniquet comprising a flexible loop or band arranged to surround a limb to be treated, and a lever handle fulcrumed on the loop andhaving a compressing member proj ecting out of `line with the ulcrum and the free end of the handle in :the `plane of the 6. A tournlquet comprising a flexible loop or band arranged to surround a limb to be treated, means for adjusting the sizefofthe loop, a handle having` one end connected to said :loop `and arranged to Acause a portion between the connected end and the free end to press inwardly against-the loop when the free end is swung'toward the loop, and adjustable'holding means between thefreeend of the handle and the loop.Y` Y

7 A tourniquet comprisingan elongated handle, a strap or band having one end fixed within the handle and aV free end passing out of the' handle at Vone end and back through the same end and' through a portion of the length of the handle to form a closed loop, aband lock situated within the handle for locking the free end of the band .passing through the handle, a projecting portion on the handle intermediate the ends, and a handle lock for locking the end of thehandle opposite the loop .end to diierent portions of the looped portion of the band. A j v In' testimony whereof I aflix my signature.

' `ROBERT` E. MCFARLANE.

Copies ofi this patent may be obtained for five` cents each, 'by addressing the Commissioner of Patents,

Washington, D. CJ. d 

